IGO Interactive Annual Report 2019

NOVA OPERATION — MINERAL RESOURCES Source JORC Code Class FY18 CY18 Mass Nickel Copper Cobalt Mass Nickel Copper Cobalt (Mt) (%) (kt) (%) (kt) (%) (kt) (Mt) (%) (kt) (%) (kt) (%) (kt) Underground Measured 11.9 2.1 256 0.90 104 0.07 9 12.5 2.1 261 0.8 104 0.07 9 Indicated 1.1 0.9 10 0.39 4 0.04 0.4 0.6 1.0 6 0.4 2 0.04 0.2 Inferred 0.1 0.6 0.4 0.2 0.1 0.02 <0.1 0.04 1.9 1 0.7 0.3 0.06 <0.1 Subtotal 13.0 2.0 266 0.8 109 0.07 9 13.2 2.0 268 0.8 106 0.07 9 Stockpiles Measured 0.1 1.7 2 0.7 1 0.07 0.1 0.1 2.1 1 0.9 1 0.08 0.1 Total Measured 12.0 2.1 258 0.87 105 0.07 9 12.6 2.1 263 0.8 104 0.07 9 Indicated 1.1 0.9 10 0.4 4 0.04 0.4 0.6 1.0 6 0.4 2 0.04 0.2 Inferred 0.1 0.6 0.4 0.2 0.1 0.02 <0.1 0.04 1.9 1 0.7 0.2 0.06 <0.1 Nova Operation Total 13.1 2.0 268 0.8 109 0.07 9 13.2 2.0 270 0.8 107 0.07 9 NOVA OPERATION — ORE RESERVES Source JORC Code Class FY18 CY18 Mass Nickel Copper Cobalt Mass Nickel Copper Cobalt (Mt) (%) (kt) (%) (kt) (%) (kt) (Mt) (%) (kt) (%) (kt) (%) (kt) Underground Proved 10.2 1.93 197 0.79 80 0.07 7 11.3 1.91 215 0.76 86 0.06 7 Probable 1.3 1.34 18 0.57 8 0.04 1 0.2 1.26 2 0.46 1 0.04 <0.1 Subtotal 11.6 1.86 215 0.76 88 0.06 7 11.5 1.90 217 0.76 87 0.06 7 Stockpiles Proved 0.1 2.4 2 1.02 1 0.11 <0.1 0.1 2.11 1 0.86 1 0.08 <0.1 Total Proved 10.3 1.92 198 0.79 81 0.07 7 11.4 1.91 216 0.76 87 0.06 7 Probable 1.3 1.34 18 0.57 8 0.04 1 0.2 1.26 2 0.46 1 0.04 <0.1 Nova Operation Total 11.7 1.86 216 0.76 89 0.06 7 11.5 1.90 219 0.76 87 0.06 7 TABLE 3 — 30 June 2018 and 31 December 2018 TABLE 4 — 30 June 2018 and 31 December 2018 NOVA OPERATION TABLE 2 — 30 June 2018 and 31 December 2018 IGO TOTAL CONT. IGO TOTAL — ORE RESERVES Project or Operation Mass (Mt) Grades estimates In situ metal estimates Ni Cu Co Au Ni Cu Co Au (%) (%) (%) (g/t) (kt) (kt) (kt) (koz) FY18 Nova Operation (100%) 11.7 1.86 0.76 0.06 - 216 89 7 - 30-6-2018 Long Project (100%) - - - - - - - - - Tropicana Gold Mine (30%) 19.5 - - - 1.89 - - - 1,185 End of FY18 Total 31.2 Grades are not additive 216 89 7 1,185 CY18 Nova Operation (100%) 11.5 1.90 0.76 0.06 - 219 87 7 - 31-12-2018 Long Project (100%) - - - - - - - - - Tropicana Gold Mine (30%) 19.7 - - - 1.77 - - - 1,122 End of CY18 Total 31.1 Grades are not additive 219 87 7 1,122 CY18/FY18 Nova Operation (100%) 101% 102% 100% 100% - 101% 98% 100% - (relative) Long Project (100%) - - - - - - - - - Tropicana Gold Mine (30%) 101% - - - 94% - - - 95% CY18/FY18 100% - Grades are not additive - 100% 98% 100% 95% IGO ANNUAL REPORT 2019 — 29